Mesoporous silica spheres from colloids

Ho, Jenny, Zhu, Wei, Wang, Huanting, & Forde, Gareth M. (2007) Mesoporous silica spheres from colloids. Journal of Colloid and Interface Science, 308(2), pp. 374-380.

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A novel method has been developed to synthesize mesoporous silica spheres using commercial silica colloids (SNOWTEX) as precursors and electrolytes (ammonium nitrate and sodium chloride) as destabilizers. Crosslinked polyacrylamide hydrogel was used as a temporary barrier to obtain dispersible spherical mesoporous silica particles. The influences of synthesis conditions including solution composition and calcination temperature on the formation of the mesoporous silica particles were systematically investigated. The structure and morphology of the mesoporous silica particles were characterized via scanning electron microscopy (SEM) and N2 sorption technique. Mesoporous silica particles with particle diameters ranging from 0.5 to 1.6 μm were produced whilst the BET surface area was in the range of 31-123 m2 g-1. Their pore size could be adjusted from 14.1 to 28.8 nm by increasing the starting particle diameter from 20-30 nm up to 70-100 nm. A simple and cost effective method is reported that should open up new opportunities for the synthesis of scalable host materials with controllable structures.

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12 citations in Scopus
11 citations in Web of Science®
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ID Code: 81557
Item Type: Journal Article
Refereed: Yes
Keywords: Colloidal silica, Electrolyte, Mesoporous silica, Polyacrylamide hydrogel, Sphere, Colloids, Electrolytes, Hydrogels, Scanning electron microscopy, Synthesis (chemical), Polyacrylamide hydrogels, Silica, polyacrylamide gel, silicon dioxide, article, colloid, cost effectiveness analysis, cross linking, hydrogel, precursor, priority journal, surface property, synthesis, temperature, Microscopy, Electron, Scanning, Nitrates, Sodium Chloride
DOI: 10.1016/j.jcis.2007.01.009
ISSN: 0021-9797
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 06 Feb 2015 00:07
Last Modified: 11 Feb 2015 04:41

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